Nonrising stem valve



Sept. 9, 1930. L, H, MOE

NONRISING STEM VALVE Filed July 16, 1927 WMM 11 NEE Q Patented Sept. `9, v1930 LAWRENCE II. MOE, on CHICAGO, ILLINOIS, AssIGNoIe To CRANE co., or CHICAGO, y, 1

i i i. ILLINOIS, A CORPORATION on ILLINOIS i i NonnIsInG STEM VALVE I 'Application iaJuiy 1e, ieg?. 4.serial No. 206,201.`

rlhis `invention pertains to valves-of `the non-rising stem type and more particularly tothe provision ofatlirust' bearing for suoli Fie type ofvalve. A A A `All non-rising `stem-valves must of necessity beprovided' with some type of thrust ybearingand it isquite usual for the body Or bonnet of the valve as the case maybe to be provided-With a bearing shoulder against which acolilar integral With or` secured' tothe valve stein, engages for absorbing the thrust' which occurs `olurin `,f the opening and closing- Inovements of the valve. Various complicated thrust bearing arrangements have been providedrbut all ofthem are expensiveV and inaccessibleito-a greaterorl lesser eXteiit. @ne of Athe.cheapest and most," satisfactory thrust bearing arrangements Vis `that in which the body, cap onV bonnet isprovided with an inter-iorly openingj recess `circumgterentially about" the stem? for the reception of. aA coll'ar secure'df `to orf integral withy the stemand `tl-ireaded` or otherwise arranged for `the reception ot a packing gland or th-rust gland nut lvvhiich ordinarily abuts; 'against the side of` theicollar oir-the stem opposite the side of thel collar abutting against the interior end ofthe recess.

` Withthis specified arrangement it is preferable either toJ Weld the collar on the stem,V (2) to heat-and `upset the stem at the 1 placei at which the collar is desiredand: therefornithe same,l or, to machine Vdown an Over-sizestemfrom its opposite ends to.`

`35 Ward the place Where `the collar is desired.

y passthroug-hthe valveand theireii'ectsf. Par` Hovvfever,` any one of these# methods is expensive 'andi often unsatisfactory and by reason ofthekv location of thethrust' bearing; iin the bonnetv` orb bodly-ca-p it isexposed toga greater `oirlesser degree to Whatever fluids which may ticularly"detrimental is tlieeii'i'ect of' steam,

acids andthe like. Then too, y although the 1 valve` bonnet or valve cap designs arrangements are not. particularly Well suited for i inconporation. of? thrust bearings, ithas been` deemed-ith@ most desirable and satisfactoryiaurangement soifairdevised.A

Ehave devised; arrangement whereby all the'diicultiesand unsatisfactory featuresem countered Witlithrust bearing constructions and arrangements such as `those above 3described may be entirelyelim-inated by simple, cheap vand eiective means which at the saine time Will have additional advantages and unique features, all form-ing a primary object of my invention.

Another object is to `provide a novel type. of thrust bearingfor a valve stem of a valve of the character described which may be easily and conveniently lubricated and one which Will retain-lubrication for a longer mali load o n each thrust-bearing lince;

Many fui-'therobjects,` the advantages and l operation of the inventionY will' be or should become readily appreciated aiteireading the following description and claims and after viewing the drawing in which:

Fig; l `is. a side elevation oifar non-rising stem gate valve, partially in section, embodyingA my invention,

Fig. 2 is a sectional elevation of one form of yoke having a thrust bearing,constructed in accordance with the invention,` taken on the-.line 2-`2 of Fig. 3,5` f

Fig. 3 isa top plan vieivofsuchyoke,

Fig. 4e isan elevational View of the interior side of the right hand half ofthe on the line 4 4 of Figi.` 8, and

Figa 5 is a fragmentary det-ail `of ayinodilied typeof thrust bearing arrangement.

The non-rising stem valve chosen for illustration of the invention includes a body geni ei'allydesignated 2 having ports 3 and 4 .com-

munication betWeenfWhich is established or Vcut oil2 by gateinembers5` (one only shojvn). The jgatermembers are operated by *a* nonfrising stem 6` which passes through abonnet for cap secured tothe body by bolts and nuts 8 inthe usual mannerl The bonnet is provided With a packing recess 9 into Which packing is lirst placed and thereafter compressed by apacking gland member l1 which in. turn is forced downwardly by a compresyolie, taken sion plate member 12 adjustabiy connected to the bonnet by suitable bolts 13. 'A sealing cone 14 adapted to be wedged tightly between the stem and the bonnet i by engagement With the top of the valve gate member When Vthe latter is raised is held in its position by a sealingV abutment ring 15 preferably threaded onto the stem and secured by a set screw in its proper position.

Instead of making the stem 6 of oversize and then turning it down to provide a thrust bearingl which would ordinarily be locked in a position just above the sealing cone 14- in a recess in the bonnet and instead ot the other expensive and unsatisfactory method of torming a thrust bearing Which consists in upsetting the stem to form a collar thereon at the place Where it is desired, I utilize a stem originally of the size and diameter that is finally desired and groove the same at one or more places adjacent its top or outer end for the reception of corresponding rings or projections formed in a yoke member which embraces the stem. In the present instance the yoke member is made in two substantially identical halves 16 and 17 for convenience ot' manufacture and each of these halves is suitably bolted to lugs formed on the bonnet by bolts which pass through holes 18 is Well known.

The complementary halves 16 and 17 ot the yoke are secured together by stud bolts or the like which pass through holes 19 and each is grooved with one or more comparatively shallovv concentric grooves 21 so arranged that when the halves of the yoke are put together the complementary grooves will register With one another. Then several grooves are 'formed rings or projections 22 are likewise formed between them and these projections or rings are so spaced, constructed and arranged that they will fit Within the grooves formed circumferentially of the stem While the spaced rings or projections on the stem [it into the grooves formed in the yoke halves. In Figs. 1 to 4, inclusive, the thrust shoulders formed on the stem and yoke are shown slightly beveled Whereas in F ig. 5 the cooperating thrust shoulders are shown square but as the shape of the thrust shoulders is a matter of design and may be varied to suit various conditions and circumstances no further reference to them Will be made here. In Figs. 2 and 4 the yoke shown is provided with a grease or lubricant chamber or conduit for supplying a. lubricant to the thrust bearing and it' desired may be supplied through the typical pressure greasing fitting 24. V'Vhen heavy grease is to be supplied to the thrust bearing the thrust bearing in one side of the yoke may be longitudinally channeled as shown in 25 of Fig. 4.

Location of the thrust bearing in the yoke saves the thrust bearing from the riletrimental action caused by steam, acid or any other gas or liquid passing through the valve. The lubricant Will last longer and less power for operation Will be required While the Wear on the bearing surfaces is reduced substantially to a minimum. The arrangement also affords greater and easy access to the thrust bearing for itis no longer necessaryl to cut out the valve Jfrom the line while the thrust bearing is being inspected, etc.

With the arrangement which I have described a great saving in the manufacture oi valve stems may be eiected for, as has been noted above, machining the stem trom a larger diameter to form the thrust bearing is quite expensive particularly where brass or bronze stems are required due to the high cost ot' the material which is Wasted, and upsetting the stem to provide a thrust collar embodies a strain on the material, is costly and cannot be used commercially ior nonierrous materials Without reducing the strength of the metal. On the other hand it is but a simple matter to machine the comparatively shallow grooves or rings in the stem and yoke members and Where a plurality of rings and grooves are formed the several thrust shoulders receive the thrust and the wear is reduced thereby providing a thrust bearing oi4 greater lii'e. Furthermore, should the machining of the grooves and rings be slightly inaccurate Where the thrust bearing is of the multiple ring and groove type a slight amount of Wear will bring other thrust shoulders or surfaces into bearing engagement with one another so that the thrustwill be equally distributed on all.

While I have illustrated and described what is at present a preferred form of my invention it will be appreciated that it is of broader application and for that reason I do not desire to be limited to the details of construction and arrangement shown merely for the purpose of illustrating the invention but only by the spirit of the invention and the scope of the appended claims.

I claim:

1. 'In a non-rising stem valve, a valve body, a. closure member in said body, avalve stem member' for moving said closure, a two-part yoke member secured to said body and embracing said stem, means for securing the parts of said yoke together about said stem, and a thrust bearingl for said stem comprising a plurality of circumferential grooves in o ne of said members and a plurality of rings integral with the other of said members and projecting into said grooves.

2. In a non-rising stem valve, a valve body, a valve in said body, a stem` connected with said valve, a stem supporting member secured to said body and having a portion spaced from said body, and means for holding said stem against substantial longitudinal movements While permitting its rotation comprising a plurality of interengaging rings and grooves formed on `said stem and supporting mem` ber, said rings being respectively integral v with said stem and 4supporting member and the rings on said stem being of the original diameter ofthe stem, the original diameter of said Stem exceptfor said grooves being unchanged.` n

`3. In a non-rising stem valve, a valve body, a valve infsaidVV body, a stemconnected with y m said valve, a two part stein supporting yoke member secured to said body and embracing said stem at a place spaced from said body,` said yoke member parts having a plurality of complementary longitudinally 'spaced con- 15 centric rings andlgrooves at said place spaced from said body, and said stem having rings fitting the groovesfin said" yoke parts and Y grooves for receiving the rings on said yoke parts whereby said stem may be rotated Withn out longitudinal movement.

In Witness ofthe foregoing I affix my sign nature.

LAWRENCE H. Mon.

Jil 

